﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace LearnRoutedEvent
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            this.AddHandler(Button.ClickEvent, new RoutedEventHandler(this.Button_Click));
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            string strOriginalSource = string.Format("VisualTree start point:{0}, type is {1}", (e.OriginalSource as FrameworkElement).Name, e.OriginalSource.GetType().Name);
            string strSource = string.Format("LogicalTree start point:{0}, type is {1}", (e.Source as FrameworkElement).Name, e.Source.GetType().Name);
            MessageBox.Show(strOriginalSource + "\r\n" + strSource);
        }

        private void ReportTimeHandler(object sender, ReportTimeEventArgs e)
        {
            FrameworkElement element = sender as FrameworkElement;
            string timeStr = e.ClickTime.ToLongTimeString();
            string content = string.Format("{0} 到达 {1}", timeStr, element.Name);
            this.listBox.Items.Add(content);
            if (element.Name == this.grid_2.Name)
            {
                e.Handled = true;
            }
        }
    }

    class ReportTimeEventArgs : RoutedEventArgs
    {
        public ReportTimeEventArgs(RoutedEvent routedEvent, object source) : base(routedEvent, source) { }
        public DateTime ClickTime { get; set; }
    }

    class TimeButton : Button
    {
        public static readonly RoutedEvent ReportTimeEvent = EventManager.RegisterRoutedEvent("ReportTime",
            RoutingStrategy.Bubble, typeof(EventHandler<ReportTimeEventArgs>), typeof(TimeButton));

        public event RoutedEventHandler ReportTime
        {
            add { this.AddHandler(ReportTimeEvent, value); }
            remove { this.RemoveHandler(ReportTimeEvent, value); }
        }

        protected override void OnClick()
        {
            base.OnClick();
            ReportTimeEventArgs args = new ReportTimeEventArgs(ReportTimeEvent, this);
            args.ClickTime = DateTime.Now;
            this.RaiseEvent(args);
        }   
    }
}
